Heliopan 82mm Circular Polarizer Multi-Coated (SH-PMC) Filter

This is the Heliopan 82mm Circular Polarizing Multi-Coated (SH-PMC) Filter. Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun.

One of the "wow" factors of this filter are the index markings on the edge of the filter ring. This allows you to hold the filter up to your eye, choose a point that you like for polarization, replace the filter on the camera and simply rotate the ring to the chosen mark.